45142420 has 12 divisors (see below), whose sum is σ = 94799124. Its totient is φ = 18056960.

The previous prime is 45142403. The next prime is 45142453. The reversal of 45142420 is 2424154.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30869136 + 14273284 = 5556^2 + 3778^2 .

It is a junction number, because it is equal to n+sod(n) for n = 45142391 and 45142400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128541 + ... + 1128580.

It is an arithmetic number, because the mean of its divisors is an integer number (7899927).

Almost surely, 2^45142420 is an apocalyptic number.

It is an amenable number.

45142420 is an abundant number, since it is smaller than the sum of its proper divisors (49656704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45142420 is a wasteful number, since it uses less digits than its factorization.

45142420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257130 (or 2257128 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 45142420 is about 6718.8109067007. The cubic root of 45142420 is about 356.0641743502.

Adding to 45142420 its reverse (2424154), we get a palindrome (47566574).

The spelling of 45142420 in words is "forty-five million, one hundred forty-two thousand, four hundred twenty".